March 2013 Wyoming Spring Snowmelt Flood Potential Outlook

Quick Synopsis:


Mountain snowpack and associated snow water equivalents (SWEs) across Wyoming continued to be generally below average by the middle of March.  SWEs at the peak snowmelt runoff elevations (8,000’ – 9.500’) were the highest across northern Wyoming at around 90 percent of normal; while across southern Wyoming, SWEs were 65 to 85 percent of average at the peak snowmelt runoff elevations. 



 …The majority of headwater basins across Wyoming can expect a generally low potential for flooding due to springtime snowmelt...


The next graphical outlook will be issued around the 20th of April. 




Other hydrological information for Wyoming can be found at the NOAA hydrology website:


Monthly Wyoming Hydrologic Summary and Graphics:

(updated monthly around the 15th of every month) 


Wyoming Drought Information Page:

(updated at least once a month)


Wyoming Graphical Water Supply Outlook:

(updated by the 15th of every month—January-June)


Wyoming Average Precipitation by Basin:

 (updated monthly) 


Wyoming Spring Snowmelt Runoff Flood Potential Graphic:

(updated by the 25th of the month---January-May) 


Current and Forecast Wyoming Streamflows and/or River Stages:






The current Wyoming Spring 2013 Snowmelt Runoff Flood Potential Outlook graphic:



This outlook is based on various diverse hydrological factors such as snow water equivalents (SWEs) in the mountain snowpack, basin morphology, extent of burn scars from 2012 fires, amount of bark beetle kill, and likely temperature and precipitation trends during late spring/early summer.  


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